Take-up device for knitting machines



S. G. DEBS ET AL TAKE-UP DEVICE FOR KNITTING MACHINES `0rigina1 Filed Jan. 2o. 192e 2 sheets-snee# 1 enaeennuu o Nov. 2 1926. 1,605,099

s. G. bEBs ET AL TAKE-UP DEVICE FOR KNITTING MACHINES Original FilGdJan- 20. 1926 2 Sheets--SheeJ 2 Patented Nev. Z, 1926.

1,605,099 PATENT Ormes.

SALIM GEORGE DEBS, 'PAUL BIRNKAIVIMER, .AND OTTO IBENS, OF BROOKLYN, NEW

YORK.

TAKE-UP DEVICE FOR KNITTING- MACHINES. ,l

Application filed llanuary 20, 1926, Serial No. 82,5l0. Renewed September 22, 1926.

Our invention relates to knitting machines and has for its object to provide a take-up device in connection wtih a straight knitting machine which will grip the finished fabric close to the point at which it leaves the needles so as to draw the finished fabric away from the needles with practically no opportunity for stretching. Where, as is usual in knitting machine, the finished fabric is drawn away from the needles by a weight or by feed rolls at a substantial distance from the point at which the finished fab-ric leaves the needles, opportunity is afforded for more or less stretching of the fabric and as, where the knitted fabric is of considerable width, the quality of the threads may vary slightly, one part may stretch more than another with resulting unevenness of the fabric.

By gripping the fabric close to the point at which it leaves the needles, evenness of the fabric throughout its width is assured and the dropping of stitches is avoided, and by varying the rate of rotation of the feed rollers a variation in the character of the fabric may be effected.

lhile the invention is particularly adapted for use with straight knitting machines of the Raschel type, it may be used in connection with any straight knitting machine.

lilith the object-s above indicated in view, our invention consists in the construction and combination of elements hereinafter described and claimed.

Referring to the drawings Figure 1 is a perspective view of a straight knitting machine equipped withthe fabric feeding device of our invention.

Figure 2 is an end view showing the operating mechanisms.

Figure 3 is a side view partly broken away of the operating mechanism.V

Figure 4 is a cross sectional view enlarged on line 4-4 of Figure 3, and Figure 5 is a longitudinal, sectional view of the eccentric.

In the drawings, Figure 1 indicates the frame of a straight knitting machine of the Raschel type having the parallel, longitudinal, stationary bars 2, 3, on the inner faces of which the needle carrying bars 4, 5, are vertically reciprocated in the usual manner, the threads being supplied from' Guides V6, above the needle bars arranged te L have the longitudinally, reciprocating and laterallyv swinging movements characteristic of this type of straight knitting machine. These bars, 2 and 3 are slightly inclined towards each other so that they are somewhat wider apart at their lower edges than at their upper edges, and at their eXtremel lower edges. have their inner faces curved outward. ln the ordinary operation of the machine the knitted fabric, 7, passes down between bars 2 and 3, and is drawn downward: as completed by weight, 8.

In the improved construction of our in vention we arrange feed rollers, positively rota-ted, as near as possible to the point at which the finished fabric leaves the needles so as to maintain an even, regulated feed of the fabric. For this purposeV we arrange a steel feed roller, 9, of relatively small diameter with its axes slightly below the lower '75 edges of the bars 2, '3, and to one side of the median line between these bars, `the periphery of this roller on oneuside being nearly in contact with the outwardly curved lower edges of bar 2. Below roller 9, with its axes in the verticle plane of the median line between bars 2 and 3, is a roller, 10, of a larger diameter than roller, 9, andhaving its periphery provided with a sandpaper or roughened surface, 11, the rollers, 9 and 10 95 beingv so arranged as to grip the fabric, 7, between them. In order to provide for the vertical movement of roller, 9, necessary to maintain proper tension `on the fabric, this vroller is journalled at its ends in levers, 12,

(only one of which is shown), pivoted at 13 to the frame members, on which the bars 2 and 3 are carried. Roller, 10, iscarried on shaft, v15, in stationary bearings inthe frame.

The roller, 9, is thus free to rotate and bears by its own weight and that of the levers, 12, upon the fabric, 7, to hold it against the sand paper 4or roughened periphery of roller, 10. Rotation of roller, 10, 10G will cause the fabric to be drawn downward between it and roller, 9.

For rotating roller 10 to thus effect the feed of the finished fabric weprovide between the driven shaft, 16, and shaft, 15, 105` mechanism by which the shaft, 15, and roller, 10, may bey driven at such regulated speed as may be desired.

The mechanism for this purpose comprises a dise, 17, secured on. shaft, le, and ne tate with. it, rotating eccentric disc. 18, and through the eccentric band, 19, and its arm, 20, will swing arm, 23, causing its point, 25, to act upon ratchetwheel, 27. Pawl, Q8, pivot-ed on the frame of the machine engages the teeth of rachet wheel, 27, to prevent it Y from moving backward. To rachet wheel,

27, is Secured a pinion E29, the teeth of which mesh with the gear, 30, which is faston shaft.y 15. llach rotation of power shaft 16, will thus effect rotation of roller, 10.

The eccentric disc, 18, is provided with a slot,- 40, titting over the shaft, 16, and slots, l11 and 4Q, one above and the other below slot, llt), andthrough theseslots bolts, 43 and et, extend intodise 17. The eccentric disc may thus be adjusted to increase or diminishthe degree of movement given to arm, 20, and the degree` 'of movement given to arm, 23, may be adjusted by shifting the pin, 21, in not, 22.

By lifting the free end of levers, 12, the roller, 9, may be separated from roller, 10, suiliciently to permit the fabric, 7, to be inserted. p

e lVeight, S, is preferably secured to the fabric below roller, 10, but need not be used.

Having thus described my invention, what I claim is :e e e l. Ina straight lniitting machine in which the knitted fabric passes between two parallel, needle carrying bars, a take-up roller of a diameter vless than the distance between the inner faces of the needle-carrying bars at their loweredges arranged immediately below the space between said needle carry ing bars withits periphery extending into said space and a second take-up roller below it so located as to gripthe finishedl fabric between its periphery and the periphery `of the first. mentioned roller, and means for rotating the second take-up roller.

2. In a straight knitting machine in which the knitted fabric passes downward between two parallel, needle carrying bars, a takeup roller having a smooth periphery surface of a diameter less than the distance between the inner faces of the needle carrying bars at their lower edges", arranged immediately below the space between said needle carryingl bars, with its periphery extending into said lspace and a second take-up roller having a rough periphery surface below it so placed as togrip the finished fabric between its periphery and the periphery of the first mentioned roller and means for rotating the second take-up roller.

3. ln a straight knitting machine in which the knitted fabric passes downward between two parallel, needle carrying bars, a take-up roller of a diameter less than the distance between the inner faces of the needle carrying bars at their lower edges arranged immediately below the space between said needle carrying bars with its periphery extending into said space, mounted to rotate freely in vertically movable bearings, and a second take-up roller below it so located as to grip the finished fabric between its periphery and the periphery of the first-mentioned roller and means for rotating the second take-up roller.

il. ln a straight knitting machine in which the knitted fabric passes downward between two parallel, needle carrying bars, a takeup roller of a diameter less than the dis` tance between the inner faces of the needle carrying bars at their' lower edges, arranged immediately below the space between said needle carrying bars, with its periphery extending into said space, and a second takeup roller below it so located as to gripA the finished fabric between its periphery and the periphery of thev first mentioned roller, and means for rotating the second take-up roller comprising a ratchet wheel, a slotted arm carrying a paw] engaging the ratchet wheel, and an operating arm adjustable in said slot. i i

lln testimony whereof, we hereunto aiiix our signatures.

SALM GEORGE DEBS. PAUL BIRNKAMMER. OTTO IBENS. 

